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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        function web_Socket(url, params) {
            return new Promise((resolve) => {
                const socket = new WebSocket(url)
                socket.onopen = () => {
                    socket.send(JSON.stringify(params))
                }
                socket.onmessage = (res) => {
                    resolve(res.data)
                }
            })
        }

        web_Socket('http://localhost:3000').then(data => {
            console.log(data)
        })
    </script>
</body>
</html>